Unfortunately, neck dive is an issue for every 34" scale 12 that I have ever played. I have the Korean made CH12, and it sounds great, but is very neck heavy.
The short scale versions aren't as bad, but they have some neck dive happening too.
As far as technique, if you really want the chimey effect of the octave strings to come out, a pick works best. But I play mine fingerstyle quite a bit too.
Most of these basses have the thicker string at the bottom of each set of strings. Does that make it harder to play with your fingers? Although I have never had the oportunity (yet) to play such a beast, I'd imagine that you'd stike the strings better if the thicker one was last in the plucking action.
Any feedback on this from the 12-stringers?
I don't need a number or any of that silly business, since I'll soon be founding the "12 string Gibson Explorer Bass Club." Yeah. Right.
My October 12 does not have neck dive. Check them out, they are awesome!